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i was wondering – when using jQuery (or any other javascript include) in my web,
does the browser cache it after the first download for all all pages (i assume yes) or will it download it every time?
2nd, when the user quits the browser and starts it again (for loading my website), will the jquery js file still be cached or will it completely download again?
thx
This depends on the browser and on how your server is set up. Have a look at the headers sent by the server along with the file (you can use a tool like Firebug to look at the headers). A good idea is to use the jQuery file hosted by google, since many other sites (including stackoverflow) use the same file. Then the browser can cache that file and never download it from your server. This page has a list of files hosted by google, and this page explains how to properly set your server up to (tell your browser to) cache files.